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Earthquake-Resistant Fiber Reinforced Concrete Coupling Beams Without Diagonal Bars
Parra-Montesinos, Gustavo Wight, James K. Kopczynski, C. Lequesne, Rémy D. Setkit, M. Conforti, A. Ferzli, J.
Parra-Montesinos, Gustavo
Wight, James K.
Kopczynski, C.
Lequesne, Rémy D.
Setkit, M.
Conforti, A.
Ferzli, J.
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Abstract
Results from large-scale tests on fibre-reinforced concrete coupling beams subjected to large displacement reversals are reported. The main goal of using fibre reinforcement was to eliminate the need for diagonal bars and reduce the amount of confinement reinforcement required for adequate seismic performance. Experimental results indicate that the use of 30 mm long, 0.38 mm diameter hooked steel fibres with a 2300 MPa minimum tensile strength and in a volume fraction of 1.5% allows elimination of diagonal bars in coupling beams with span-todepth ratios greater than or equal to 2.2. Further, no special confinement reinforcement is required except at the ends of the coupling beams. The fibre-reinforced concrete coupling beam design was implemented in a high-rise building in the city of Seattle, WA, USA. A brief description of the coupling beam design used for this building, and construction process followed in the field, is provided.
Description
Date
2017-03-01
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Publisher
American Concrete Institute
Research Projects
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Keywords
Link beams, Steel fibres, Shear, Coupled walls, Displacement reversals
Citation
Parra-Montesinos, G. J., Wight, J. K., Kopczynski, C., Lequesne, R. D., Setkit, M., Conforti, A., and Ferzli, J. (2017). “Earthquake-Resistant Fiber Reinforced Concrete Coupling Beams Without Diagonal Bars.” SP-310: Fibre-Reinforced Concrete: From Design to Structural Applications FRC 2014: ACI-fib International Workshop, Special Publication of the American Concrete Institute, Farmington Hills, MI.